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Letters Patent No. 72,497, elated December 24, ISST.

IMPROVED MACHINE FOR BORING POS'IHOLES.

TO'ALL WHOM IT MAY CONCERN:

Be it known that I, WILLIAM R. ILES, of West Rushville, in the-countyof Fa ireld, and State of Ohio, have invented a new and useful Improvement in Machine for Boring Post-Holes and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to a new and improvedA machine for boring post-holes in the earth, and the inven tion consists in operatingan upright shaft by cranks and gearing, in the manner hereinafter described.

Figureis a central sectional elevation of themachine through the line .fr m, iig. 2.

Figure 2 is a side elevation of the machine,show ing the'gearing and the shaft or spindle, and the cranks by 4which the machine is operated.

.I Figure 3 is a horizontal section through the line y of fig. 1.

' Figure 4 shows a section of the horizontal gear-wheel.

Fig'urc is a top view of the cutting-bits and valves on the end of the spindle. Similar letters of reference indicate corresponding parts. h This machine is supported on-a platform, of suitable size, by upright stands, `tv whioh handles are attached, by which the machine is carried. 5.A represents the` platform; B, the upright stands; C, thehan-dlesj D is a lbracket, ofcast iron, orsome other suitable material, which has jo'urnals at each end, which rest in boxes upon the top ends of the stands B. By this bracket the gear-wheels are supported, land vthe centre of it forms a nut for the screwon the shaft or spindle. E is the spindle, which is of suitablelength lfor the purpose intended, and which has a screw-thread cut upon it, as seen in the drawing. The spin dle is in two parts, which are coupled together, as seen atF, in gs. 1 and G represents the cutting-bits, on the end of the lower part of the spindle, which lower partis marked F. This coupling' is what is called` a snap-coupling, the arrange- :nent being such that when the'spindle is turned in one direction,'the lower part F turns with E. Thisis when the'mai'chine is boring and the spindle descending. When the spindle is thus descending, the spring pawls a a,

.-(seen in 3,) engage with the shoulders e c, in the coupling. But when the spindle E is turned in an oppo vsite-direction, the pawls will not soengaga'butslp past the shoulders, and* the consequence is that the cutters,

with the valve, being loaded-with earth, Ste., will` be raised by the screwfrom the bottomef the hole without being revolved. H is the main gear-wheel, which is driven by the pinons J J `on the crank-shaft K, 'as seen in iig. 2. This gearwheel H- is attached to a sleeve, z', (seen in section lin lig. 1,) .which sleeve is secured to the centre of the bracket D by a collar, m, and" c ap n, as seen in the drawing. o is a key, by which the wheel is fastened to the sleeve. Ae seen in fig. 2, the spindle E has a longitudinal slot,p, .cut-in it, and the sleeve has a feather, as seen at `r, g. 4, so that as the spindle is turned by the gear, the spindle, being carried round by the feather,'.passes up and down through the sleeve as it is fed'idown or drawn upward by the nut and screw.

As before stated, the nut is in tbe 'centre of' the bracket at S. TheA two bits Gr Gr have 'valves' or wings hinged to them, which are marked Gf, which rise as the boring proceeds, so'as to let the earth and stones pass up, but which close down when the bit and spindle are raised, or the motion reversed, to clear the hole. As thelv machine will not always. stand on level ground when in use, the pivots or journals on the bracket-D, (seen at ff,) allowthe spindle to be placed at any desired inclinationor angle, so as to bore avertical hole on a sidehill if desired. T represents a slide on the platform A, with an aperture in its centre for the passage of the bits Gr. Thisslide is adjustable, so as to be aguide for -the bit, and it is held in'the desired position by hooks uwhich are attached to the inner sides of the stands B. V indicatesl pins, which are forced into the earth by the weight of those who operate the vmachine or 'otherwise,.'wh`ich keeps the machine steady while it is in operation.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is'- 1. The bracket D, suspended on' the jonrnals ff, in combination with the gear-wheels, substantially as described. v

2. The hinged valves or wings G', in combination with the cutting-bits, substantially 'as shown and described.

WILLIAM R. ILES.

Witnesses:

CHARLES V. Hoven, Amos L. HARMAN.' 

